Machine for perforating paper



No. 609,682. Patented Aug. 23, I898. A. KRAH. MACHINE FOR PEBFORATINGPAPER, 8w.

(Application filed Feb. 16, 1897.)

(No Model.)

ll lll i INVENTOR ATTORNEY UNITED STATES PATENT FFICE.

ARMIN KRAI'I, OF BERLIN, GERMANY.

MACHINE FOR PERFORATING PAPER, 84.0.

SPECIFICATION forming part of Letters Patent No. 609,682, dated August23, 1898.

Application filed February 16, 1897. Serial No. 628,646. (No model.)

T0 at whont it may concern.-

Be it known that I, ARMIN KRAH, a citizen of the German Empire, residingat Berlin, in the Kingdom of Prussia, German Empire, have inventedcertain new and useful Improvements in Machines for Perforating Paperand the Like; and I do hereby declare that the following is a full,clear, and exact description of the invention,which will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to a device for perforating sheets of paper andsimilar material which may afterward be collected in portfolios,letter-files, or the like, its characteristic feature being arack-and-pinion arrangement by which the pins or punches effecting theperforations are operated.

This invention is illustrated in the accompanying drawings, in Which-Figure 1 represents a cross-sectional view thereof. Fig. 2 is a plan ofthe same. Fig. 3 is a cross-sectional View of a portion of Fig. 1, drawnto an enlarged scale. Fig. 4 is a side elevation of a perforating devicein which no spring is used.

Upon a base or board a a steel cutting-plate b is fixed, provided withholes i, which allow the cutting pins or punches e (of which four areshown in the drawings) to pass through. These cutting pins or punchesare located in suitable bearing-blocks o and are capable of being movedup and down. The said blocks are fastened to the cutting-plate b bymeans of rivets, screws, or the like. The pins or punches e are providedwith teeth e, so as to form rack-bars. These teeth e engage gears d,housed in and concealed by the opposite bearing-blocks c and forming apart of a horizontal rock-shaft d, which is journaled at its ends in thebearing-blocks.

A lever-handle f is attached centrally to the said shaft 01 between theblocks or bearings, and a spiral spring 9 is so arranged as toconstantly press the handle and shaft in a direction opposite to thatindicated by the arrows in Figs. 1 and 3.

In order to perforate sheets of paper or the like, the sheets are placedinto the narrow space between the under side of the blocks or bearingsand the cutting-plate b, and subsequently the handle or lever is presseddown cutting-plate b. After the sheet or sheets of paper has been thusperforated the handle or leverfis released and returns, owing to theaction of the spring g, to its initial position, (shown in Fig. 1,) sothat the device is again ready for use.

In order that the places where the sheet or sheets of paper beperforated may be conveniently adj usted, aslide h,of sheet metal,isprovided, which is bent up vertically at It, thus forming a stop. Thesheet or sheets of paper or the like is placed against this stop, sothat the holes may be formed as nearly as possible equidistant from thecenter of the side edge of the sheet or sheets to be perforated and sothat the sheet or sheets may be correctly placed in the portfolio,letter-file, or the like. The slide h is provided with graduations andappropriate denominations-for example, quarto, octavo, folio, and soon-to correspond with the current shapes of paper used, so that theslide may be readily adjusted, as required.

The pieces of paper separated from the sheets by the perforatingoperation fall through the hole '5 in the cutting-plate into a space 70,arranged beneath the holes 2' in the base or board a. This recess isclosed by the aforesaid slide 72, so that the pieces of paper canaccumulate in the space In and can only be removed therefrom by entirelywithdrawing the slide h.

The device maybe modified in various ways without departing from thespirit of the invention. Thus, for instance, the spiral spring 9 may bereplaced by one or more springs of a difierent kind. Instead of usingsprings a counterweight m may be arranged on a rod Z, as shown in Fig.l. Moreover, spring or weight may be entirely dispensed with. Further,the circular rack-bar (1 maybe arranged in front instead of being, asrepresented in the drawings, located behind the cutting pins or punches.The cutting-plate h and the blocks 0 may be of cast or wrought iron. Thehandle or lever and the plate or the whole represented device may have adiiferent external IOO shape, and so on. An essential feature, however,is that the cutting pins or punches e are moved by rack-gear d e.

What I claim is l. A paper-perforator, consisting of a base having arecess, a cutting-plate secured to the base and having holes locatedabove the recess, bearing-blocks fixed to opposite sides of the base andprovided with a series of vertically-movable punches registering withthe holes of the cutting-plate and having racks thereupon, two or morepunches being located in each bearing-block, a rock-shaft journaled atits ends in the said bearing-blocks and having gears housed within andWholly concealed. by said bearing-blocks and meshing with the racks ofthe punches, and a handle for turning the rock-shaft, substantially asdescribed.

2. A paper-perforator, consisting of a base having a recess, acutting-plate secured to the base and having holes located above therecess, bearing-blocks fixed to opposite sides of the base and providedwith a series of vertically-movable punches registering with the holesof the cutting-plate and having racks thereupon, two or more punchesbeing located in each bearing-block, a rock-shaft journaled at its endsin the said bearing-blocks and having gears housed in saidbearing-blocks and meshing with the racks of the punches, av handle forturning the rock-shaft in one direction, and a spring acting on theshaft to turn it in the opposite direction, substantially as described.

3. In a device for perforating paper, the combination with the basehaving vertical openings extending therethrough and with the aperturedcutting-plate and punching mechanism supported thereon, of an adjustable slide extending transversely through the base in line with theopenings therein and having'at one end an upward projection to serve asa guide for the paper to be punched, substantially as and for thepurpose de scribed.

In witness whereof I have hereunto set my hand, at Berlin, this 4th dayof January, 1897.

ARMIN KRAH.

Witnesses:

J. LEMAN, ALFRED UNGER.

